formation à rangs serrés

CONT: The search leader [of a disaster site] will determine if the teams will walk the area in an open- or a closed-line formation. ... The closed-line formation is utilized when visibility is obstructed or limited due to dense vegetation, debris or obstacles. The search team members walk the site in straight lines in a closed-arm (shoulder-to-shoulder) interval. The closed-arm formation is commonly used in mass fatalities incidents that involve extensive fragmentation of remains in large open areas.